The new schedule is applicable. Aussie SM610 was concerned about his warranty coverage.
In my experience, its always best to check with the dealer in advance to make sure they are on board with the revised maintenance schedule so there is no confusion if problems arise later.
The cases do need to be split and the crank pressed apart to replace the rod/big end bearing. Not a simple task.
The warranty in the USA differs from the warranty coverage provided to the rest of the world. They get 2 years, we get 1.